General characteristics:
1. Mild Winters: Winters in Iceland are relatively mild for its location due to warm ocean currents. Average January temperatures typically range from 0°C (32°F) in coastal areas to -5°C (23°F) in the central highlands.
2. Cool Summers: The Icelandic summer is quite chilly. Average July temperatures usually vary between 10°C (50°F) and 13°C (55°F). Warmest temperatures are found in southern and coastal areas.
3. High Humidity: The Icelandic climate experiences high humidity throughout the year due to being an island nation surrounded by the ocean. It often feels cooler than the actual temperature.
4. Frequent Precipitation: Precipitation is common all year round with an annual average of about 1,400 mm (55 inches). The southern part of the country experiences the heaviest rainfall while interior regions have much lesser amounts.
5. Changeable and Unpredictable: Icelandic weather is renowned for being highly changeable and unpredictable, even by the hour. Weather fronts can swiftly move causing significant changes in temperature, wind patterns, and precipitation.
It's important to note that Iceland experiences variations, especially around coastal and highland areas, and localized microclimates do occur resulting in diverse conditions within the country.